1. Department of Medical Specialities; Division of Gastroenterology and Hepatology; Geneva's University Hospitals and University of Geneva; Geneva; Switzerland
2. Department of Internal Medicine; La Tour Hospital and University of Geneva; Geneva; Switzerland
3. NHS Blood & Transplant and Translational Gastroenterology Unit; John Radcliffe Hospital; Oxford; UK
4. Department of Medicine; Division of Gastroenterology; McGill University Health Center; McGill University; Montréal; QC; Canada